Hebei Messi Biology Co., Ltd. stated that in order to overcome the defects of poor catalytic activity and poor stability of ruthenium-based ammonia decomposition hydrogen production catalysts in the prior art under medium and low temperature conditions, it provides a ruthenium-based ammonia decomposition hydrogen production catalyst for ammonia Application of decomposition to prepare carbon-free hydrogen. To this end, a ruthenium-based ammonia decomposition hydrogen production catalyst is provided, including an active component, a promoter and a carrier, the active component is ruthenium, the promoter is cesium and/or potassium, and the carrier includes metal oxide Composite carrier of substance and activated carbon. The metal oxides are magnesium oxide, cerium oxide, molybdenum oxide, tungsten oxide, barium oxide and alkali metal oxides.
The invention provides a ruthenium-based ammonia decomposition catalyst for hydrogen production. Further, by using specific proportions of magnesium oxide, activated carbon, cerium oxide, molybdenum oxide, tungsten oxide, potassium oxide, barium oxide and alkali metal oxides as carriers, it can reduce While increasing the carbon content, the stability of the carrier can be improved, and at the same time, it can also promote the decomposition of ammonia to produce hydrogen, improve the catalytic activity, and make the dispersion of the active ingredient ruthenium reach more than 50%.
The magnesium oxide-supported ruthenium catalyst for ammonia decomposition to produce hydrogen uses magnesium oxide as the carrier and metal ruthenium as the active component. The ruthenium particles are uniformly dispersed on the surface of the magnesium oxide, and the ruthenium content accounts for 0.5-10wt.% of the total weight of the catalyst. The invention utilizes a precipitation deposition method to prepare a magnesium oxide-supported ruthenium catalyst precursor, and the obtained product is washed, dried, and then reduced in a reducing atmosphere to obtain a magnesium oxide-supported ruthenium catalyst with highly dispersed ruthenium.
The preparation method of the invention is simple, and the magnesium oxide-supported ruthenium catalyst prepared by using lower-cost magnesium oxide as a carrier has the advantages of good metal dispersion, high catalytic activity, good stability, and the like, and can be used to catalyze the hydrogen production process of ammonia decomposition.